Permanent Magnets

MMG has specialized in permanent magnets for over 25 years supplying hard ferrite, alnico, samarium cobalt, neodymium iron boron, bonded, injection molded and flexible magnets. Custom shapes and sizes are available upon request.

Neodymium Iron Boron

Material Grade	Remanent Flux Density, Br [mT] minimum	Coercivity, bHc [kA/m] minimum	Intrinsic Coercivity, jHc [kA/m] minimum	Maximum Energy Product, BHmax [kJ/m³] minimum
N25	1020	756	2387	199
N28	1050	780	2387	223
N30	1080	835	1353	239
N35	1180	860	1353	279
N40	1270	875	1353	318
N42	1300	955	1592	334
N45	1340	995	955	358
N48	1380	875	955	382

Material Grade Suffix	Maximum Working Temperature [°C]
None	80
H	120
SH	150
UH	180
EH	200

Samarium Cobalt

Material Grade	Remanent Flux Density, Br [mT] minimum	Coercivity, bHc [kA/m] minimum	Intrinsic Coercivity, jHc [kA/m] minimum	Maximum Energy Product, BHmax [kJ/m³] minimum
S18	840	605	1432	143
S22	930	637	1432	175
S24	980	676	1432	191
S26	1030	716	1194	207
S28	1070	756	1194	223
S30	1100	772	1194	239

Material Grade Suffix	Maximum Working Temperature [°C]
None	250
M	300
H	330

Alnico

Material Grade	Remanent Flux Density, Br [mT] minimum	Coercivity, bHc [kA/m] minimum	Intrinsic Coercivity, jHc [kA/m] minimum	Maximum Energy Product, BHmax [kJ/m³] minimum
A2	700	44	45	12
A3	600	38	40	10
A5	1050	47	48	31
A5-7	1350	59	59	60
A6	1000	56	57	24
A8	800	123	128	32
A8B	850	124	124	44
A9	1050	112	112	72

Hard Ferrite (Ceramic)

Material Grade	Remanent Flux Density, Br [mT] minimum	Coercivity, bHc [kA/m] minimum	Intrinsic Coercivity, jHc [kA/m] minimum	Maximum Energy Product, BHmax [kJ/m³] minimum
C1	220	136	220	8
C3	350	155	160	24
C5	400	160	185	28
C8	370	240	260	28

Flexible

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